1 Ganglia-groups of neuron cell bodies that lie peripheral to the central nervous system in vertebrates. 2  Bipolar neurons-cell body located near the middle of the axon; characteristic of retinal neurons. 3  Unipolar neurons-cell body lies off to one side of axon; characteristic of sensory neurons.
The principal host for diamonds are rocks formed in the earth's mantle that are known as eclogite and peridotite that are carried to the earth's surface in magmas known as kimberlit e and lamproite.
Gems Formed in the Earthâs Mantle. 1  Magma pocket comes in contact with a weak area in crust. 2  A quick explosion results, carrying diamond-bearing magma to the surface. During the eruption, a cone builds on surface. 3  The pipe eventually cools, leaving carrot shaped pipe.